My Hermansson Marshall mod. With the tightness knob, the amp does fairly loose to insanely tight, with zero boost pedals required.
I am mostly an ERG guy, I do play some E standard, but I am mainly playing in drop C or 7 & 8s, and I have not come across an amp-pedal combo that is as tight as this amp is straight in. I had a Fortin Meshuggah before, which did Meshuggah with a Fortin 33, and my Hermansson with the high-mid boost switch engaged can achieve that sound while being tighter and fatter at the same time. When looking for those saggier/sludgier tones, it's as easy as turning the tightness down and switching the built-in low-mid boost on.